flutter网络请求json

import 'dart:async'; import 'dart:convert'; import 'package:http/http.dart' as
http; import 'package:flutter/material.dart';
//使用网络请求json class HomePage extends StatefulWidget { @override _HomePageState
createState() => _HomePageState(); } class _HomePageState extends
State<HomePage> {final String url = "https://swapi.co/api/people"; List data;
@override void initState() { super.initState(); this.getJsonData(); }
Future<String>getJsonData() async{ var response = await http.get( //encode the
url Uri.encodeFull(url), //only accept json response headers: {"Accept":
"application/json"} ); print(response.body); setState(() { // ignore:
deprecated_member_use var convertDataToJson = JSON.decode(response.body); data=
convertDataToJson['results']; }); return "Success"; } @override Widget build
(BuildContext context) {return Scaffold( appBar: AppBar( title: Text("Retrieve
Json via Http get"), ), body: ListView.builder( itemCount: data == null? 0:data.
length, itemBuilder: (BuildContext context,int index){ return Container( child:
Center( child: Center( child: Column( crossAxisAlignment: CrossAxisAlignment.
stretch, children: <Widget>[ Card( child: Container( child: Text(data[index][
'name']), padding: EdgeInsets.all(20.0), ), ) ], ), ), ), ); }, ), ); } }

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